Re: [PATCHv7 00/29] THP-enabled tmpfs/shmem using compound pages

[Wincy Van]

On Wed, Apr 20, 2016 at 1:07 AM, Andres Lagar-Cavilla
<andreslc@xxxxxxxxxx> wrote:
> Andrea, we provide the, ahem, adjustments to
> transparent_hugepage_adjust. Rest assured we aggressively use mmu
> notifiers with no further changes required.
>
> As in: zero changes have been required in the lifetime (years) of
> kvm+huge tmpfs at Google, other than mod'ing
> transparent_hugepage_adjust.

We are using kvm + tmpfs to do qemu live upgrading, how does google
use this memory model ?
I think our pupose to use tmpfs may be the same.

And huge tmpfs is a really good improvement for that.

>
> As noted by Paolo, the additions to transparent_hugepage_adjust could
> be lifted outside of kvm (into shmem.c? maybe) for any consumer of
> huge tmpfs with mmu notifiers.
>

Thanks,
Wincy